YKK Design Manual - ThermaShade-58

ThermaShade®
Chart A
ALLOWABLE UNIFORM COMBINED
LOAD FOR THERMASHADE
ATTACHED TO E9-3107 MULLION
8
7
6
5
4
3
2
20 40 60 80
ALLOWABLE COMBINED LOAD (PSF)
Chart B
ThermaShade
Length
24 Inch
24 Inch
24 Inch
24 Inch
30 Inch
30 Inch
30 Inch
30 Inch
36 Inch
36 Inch
36 Inch
36 Inch
Combined
Load
80 PSF
60 PSF
40 PSF
30 PSF
80 PSF
60 PSF
40 PSF
30 PSF
80 PSF
60 PSF
40 PSF
30 PSF
E9-3107
WITH HORIZONTALS
WITHOUT THERMASHADES
V
E
R
T
I
C
A
L
S
P
A
N
(FT)
10
11
12
13
14
15
16
17
18
19
8
9
23 45 67
MULLION SPACING (FT)
Page-58
Reduction
Factor
0.84
0.87
0.91
0.93
0.77
0.81
0.87
0.90
0.70
0.75
0.82
0.86
Calculation Worksheet for E9-3107
Use the following charts to validate outrigger projection, mullion
spacing, and vertical span. The following worksheet is for one
standard ThermaShade per mullion.
Use the following job requirements as an example:
Combined Load = 40 psf
Mullion Spacing = 5'
Desired Outrigger Projection = 24 "
Vertical Span = 13.9'
Wind Load = 25 psf
24 "
30 "
36 "
STEP 1
OBTAIN COMBINED LOAD
*COMBINED LOAD: __________(example: 40 psf)
*Allowable combined load (in PSF) as required by the code of jurisdiction
and/or code referenced ASCE standard (Minimum Design Loads for
Buildings and Other Structures) and determined by the building engineer
of record (reference signed document) consisting of dead load plus other
load effects such as snow, snow surcharges and drifts, ice, wind, live load
roof, or others.
STEP 2
VALIDATE OUTRIGGER PROJECTION
Using Chart A, validate the desired sunshade depth (outrigger projection).
*COMBINED LOAD: __________
(Draw a vertical line at the Combined Load. Example: 40 psf)
VERTICAL MULLION SPACING: __________
(Draw horizontal line at Mullion Spacing. Example: 5')
DESIRED OUTRIGGER PROJECTION: __________
(Example: 24 " )
Intersecting point must be below the curve of the Outrigger Projection.
In the example shown, the intersecting point is below the 24 " Outrigger
Projection curve, therefore it is validated.
STEP 3
DETERMINE REDUCTION FACTOR
Determine Wind Load reduction factor from Chart B.
REDUCTION FACTOR: __________(example: .91)
Note: Interpolate the reduction factor for combined loads not shown.
STEP 4
APPLY REDUCTION FACTOR AND VALIDATE THE DESIRED
VERTICAL SPAN
Using the standard Wind Load Chart to the left, apply the Reduction
Factor to the Vertical Span.
-Draw a vertical line at the Mullion Spacing until it intersects the desired
Wind Load curve. (Example: 5'/25psf)
25 PSF
35 PSF
45 PSF
55 PSF
65 PSF
-Draw a horizontal line at the intersecting point and determine the Vertical
Span (before applying the Reduction Factor). (Example: 13.9')
-Multiply the Vertical Span by the Reduction Factor to determine if the
reduced span is acceptable. For example:
13.9' (Vertical Span) X .91 (Reduction Factor) = 12.6'. Since 13.9' is
greater than 12.6', the desired Vertical Span has been validated.
If any of the data calculated above does not validate the desired job
requirements, consider reducing the outrigger projection, mullion spacing
or vertical span. Solutions may also be available to meet your specific
needs by contacting our engineering group at 1-866-955-2732.
Effective Date: April 19, 2024 | 09-1000-08
MULLION SPACING (FT)
OUTRIGGER
PROJECTION
YKK Design Manual

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